package com.example.boot.interceptor;

import lombok.extern.slf4j.Slf4j;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author shkstart
 * @creat 2021-04-05-下午12:02
 */
@Slf4j
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String requestURI=request.getRequestURI();
        log.info("拦截的请求路径是"+ requestURI);

        HttpSession session=request.getSession();
        Object loginUser = session.getAttribute("loginUser");
        if(loginUser!=null){
            return true;
        }else {
            session.setAttribute("msg","请先登录！");
            response.sendRedirect("/");
            return false;
        }

    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
    /**
     * 整个拦截顺序为preHandle、目标方法、postHandle、afterCompletion
     */
}
